[Observium] Best SNMP configuration for CISCO switch and router

Hello list,

What is the best SNMP configuration to use to feed back information from switch (Catalyst) and router (ASR) ?

I use the following configuration on my equipment but I wonder if there is not better (MIB) :

snmp-server group READONLY v3 priv read MIB-2 snmp-server view MIB-2 iso included

Thanks !